Weighted compatibility from inevitable sample pairs
Lax342547.PairPositions · concepts/Lax342547/PairPositions.lean · lax-342547
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Lemma
The product law at two distinct positions and a finite union bound turn an unavoidable compatible pair into a weighted probability lower bound.
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Evidence
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| 1 | import Lax342547.DisjointSampling |
| 2 | |
| 3 | /-! |
| 4 | --- |
| 5 | title: Weighted compatibility from inevitable sample pairs |
| 6 | type: lemma |
| 7 | --- |
| 8 | The product law at two distinct positions and a finite union bound turn an unavoidable compatible pair into a weighted probability lower bound. |
| 9 | -/ |
| 10 | |
| 11 | namespace Lax342547.PairPositions |
| 12 | |
| 13 | open Lax342547.RelativeEntropy Lax342547.RetainedImages Lax342547.FiniteSampling Lax342547.CellAveraging |
| 14 | open scoped BigOperators |
| 15 | |
| 16 | axiom distinct_pair_probability {ι Ω : Type} [Fintype ι] [Fintype Ω] [DecidableEq ι] |
| 17 | (μ : Ω → ℝ) (E : Ω → Ω → Prop) (i j : ι) (hij : i ≠ j) (hμ : Probability μ) : |
| 18 | cellMass (productLaw (fun _ : ι => μ)) (fun x => E (x i) (x j)) = pairEventMass μ μ E |
| 19 | |
| 20 | axiom inevitable_pair_mass {ι Ω : Type} [Fintype ι] [Fintype Ω] [DecidableEq ι] |
| 21 | (μ : Ω → ℝ) (E : Ω → Ω → Prop) (hμ : Probability μ) |
| 22 | (hevery : ∀ x : ι → Ω, ∃ i j, i ≠ j ∧ E (x i) (x j)) : |
| 23 | 1 ≤ (Fintype.card ι : ℝ)^2*pairEventMass μ μ E |
| 24 | |
| 25 | end Lax342547.PairPositions |
| 26 |
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